This stainless steel Portable Eyewash is designed to hold 8 gallons of water. Complete with pressure gauge, air filler and pressure relief valve. 1/2" NPTF chrome-plated brass, stay-open ball valve. Activated by stainless steel push handle. Twin spray heads have balance control screw and dust caps. 6' drench hose/valve is 3/8" NPTF chrome-plated brass, self-closing squeeze valve.